Introduction
Fig.4: EL9501, EL9561Power supply terminals 0...20 V DC, 0...2 A
The EL9501 and EL9561 power supply terminals generate an adjustable output voltage from the 24 V DC input voltage. This makes them suitable for supplying sensors or devices that require less than 24 V (the industry standard), either as a fixed voltage source, a variable supply, or a regulated supply. They can also be used similarly to an analog output terminal to simulate varying signals but have far more output power than a 20-mA channel. The current limitation is controllable, enabling operation in constant-current mode as well.
The EL9561 has an electrical isolation between the input and output sides. This makes other supply methods possible, such as a potential-free "floating" supply or stacked/cascaded voltage configurations.
The terminals are designed as analog output terminals and have an internal, informative feedback measurement of the output voltage and current. This opens up various application possibilities. The terminals can therefore be integrated into an external control circuit, e.g. to reduce load effects:
- Monitoring the output voltage for resonance and overload effects
- Self-diagnosis of the 24 V power supply for fluctuations (EL9501 only).
Special features:
- Adjustable output voltage, thus CV operation (constant voltage)
- Adjustable current limitation, thus CC operation (constant current)
- Integrated diagnostics/feedback measurement
- Optional electrical isolation of the output
The terminals are part of the group of adjustable supply devices:
- EL9501: Operation with voltage setpoint 0...20 V, up to 2 A, up to 15 W, without electrical isolation to the power contact supply
- EL9561: Operation with voltage setpoint 0...20 V, up to 2 A, up to 4.8 W, with electrical isolation to the power contact supply
- EL2595: Operation with current setpoint, up to 48 V, up to 700 mA, up to 33 W
- EL2596: Operation with voltage setpoint or current setpoint, up to 24 V, up to 3 A, up to 14 W
- ED4172: Operation with voltage or current setpoint up to ±10 V, up to 20 mA (as an example from the ED4x7x family)
- EL4132: Operation with voltage setpoint ±10 V, up to 20 mA (as an example from the EL41xx family)
- EL4012: Operation with current setpoint 0...20 mA, up to 10 V (as an example from the EL40xx family)
If no adjustable output is required, fixed-voltage devices are a suitable option:
- EL9505/9508/9510/9512/9515: Output voltage according to type, up to 0.5 A, without electrical isolation to the power contact supply
- EL9560: 24 V output, up to 0.1 A, with electrical isolation to the power contact supply
- EL9562/EL9562-0015: 2 x 24 or 15 V output, up to 0.3 A, with electrical isolation to the power contact supply
- PSxxxx: DIN rail-mounted switch mode power supply units